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  1. #1
    Cret's Avatar
    Lives in IOM, United Kingdom. Last Activity: 06-04-2014 Has been a member for 7-8 years. Has a total post count of 19.
    Hi guys


    I've got a bunch of Nema 23 steppers and am wondering if anyone can clarify if they'd be suitable for using to convert my machine to CNC. I know it's Nema 23 I need, but not certain of what spec I can use.


    The labelling on them is:


    kh56km2u004b
    DC 1.6v 2.1A 1.8degree/step
    AX050158A/G5641921
    No 4Y01
    Japan Servo Co Ltd


    Was thinking about these drivers/breakout board, then obviously would need a suitable power supply too:
    3 Axis DIY CNC Kit for Nema17 Nema23 Nema34 Motor TB6600HG Stepper Drivers 5A | eBay
    Appreciate any advice on this as I'm new to the world of CNC but have these steppers that were given to me (with assorted other ones) and would like to use them if possible to keep costs as low as I can.


    Thanks
    Jim

  2. #2
    My little Denford Novamill uses nema 23 steppers of about this rating on x and y but has a bigger nema 34 on Z. As the x3 is a significantly bigger mill I suspect the size 23 you have will be a bit underpowered for x and y and definitely for z!

  3. #3
    Oops, sorry just realised you said x2! That might be better, really you need to measure what torque you need to turn the screws and make sure your motors can deliver it. Would need less if you fitted ball screws.

  4. #4
    And I bought a similar set of drivers and BoB from eBay and it works just fine.

  5. #5
    Cret's Avatar
    Lives in IOM, United Kingdom. Last Activity: 06-04-2014 Has been a member for 7-8 years. Has a total post count of 19.
    Thanks - I've not managed to find the spec on these steppers yet unfortunately so it's hard to compare to builds others have done.

    People seem to suggest anything from 270-425oz for the X2, but the lower end would be fine for me to get started since I got these free. I'd only ever be doing light work and speed doesn't bother me for now.

    Definitely intending to change to ballscrews but can't afford to just now. So I was hoping to achieve a cheap but functional setup before hand, so that it'll be ready automated and a big improvement when the budget allows for ballscrews in future.

  6. #6
    Cret's Avatar
    Lives in IOM, United Kingdom. Last Activity: 06-04-2014 Has been a member for 7-8 years. Has a total post count of 19.
    Quote Originally Posted by JohnHaine View Post
    And I bought a similar set of drivers and BoB from eBay and it works just fine.
    Thanks John - tempted to buy this given the price. It states suitability for all Nema23 motors so it ought to be ok I think. Still need to source a suitable PSU thought. Hope they're not too costly!

  7. you won't find the spec online as these are custom windings, probably for a plotter. They retail for 10Euro on a polish auction site so don't expect great things, they're likely to be fairly high inductance and relatively low torque, around 0.8 - 1Nm, or 112 - 140ozin. You'll get some movement but feedrates will be severely limited. Even then you'll need to be running them at 40v+

  8. #8
    Cret's Avatar
    Lives in IOM, United Kingdom. Last Activity: 06-04-2014 Has been a member for 7-8 years. Has a total post count of 19.
    Ahh, bugger. :(

    Thanks for the info thought - better to know now. Presume I can't tell from testing impedance on the coils etc what sort of thing to expect?
    Still, for the purpose of putting something together with a theoretically working machine they'll serve a purpose proving I have an appropriately PSU.

    I think they are from a printer or plotter though as my friend said he got them from a place by the local scrapper where he dismantled them from that sort of thing.

  9. #9
    Well as I said my Novamill uses small 23 steppers at about 1.5 amps on the table drive, so they could work even if you have to keep the speed down. And you can get bigger higher torque modern steppers which are also size 23 so will be a mechanical replacement if you want to upgrade. For a psu see eBay item 330989848125 which I think is the one I bought. 23 quid plus shipping. They also have other voltages.

  10. #10
    Post a photo of the motors?

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